Page 33 - Realm Catalog

Washers

With 4.5 fasteners per square

meter of roofing sheet, washers

play a significant role in any

roofing project.

EPDM is the short form of Ethylene Propylene Diene These qualities of the EPDM makes it the first choice
Monomer. The American Society for Testing and Material for the leading fastener manufacturers. At REALM we
(ASTM) classifies this material as a M class Polymer. recommend that the consumers ensure that the washer
Ethylene and Propylene oil and natural gas are organic they purchase complies with industry standards and
building blocks of EPDM. When combined with Diene, supports the life and integrity of the roofing system.
they form a large molecule that is very stable when
exposed to sunlight, heat, ozone(UV) and moisture. The right balance of hardened, tear strength and
compression performance determine how well a
EPDM It is well suited for sealing due to its resistance cut washer assembles, compresses and resists the
to water, chlorinated water, dilute acids, alkaline, ozone tearing affects of swarf, and keeps the fastener sealed
and oxidising chemicals. It has a negligible absorption throughout its life on the roof.
rate, is not susceptible to swelling and can withstand
temperatures up to 100C.